Richard Si e269f44b25 Lazily import parallelized format modules ... `black.reformat_many` depends on a lot of slow-to-import modules. When formatting simply a single file, the time paid to import those modules is totally wasted. So I moved `black.reformat_many` and its helpers to `black.concurrency` which is now *only* imported if there's more than one file to reformat. This way, running Black over a single file is snappier Here are the numbers before and after this patch running `python -m black --version`: - interpreted: 411 ms +- 9 ms -> 342 ms +- 7 ms: 1.20x faster - compiled: 365 ms +- 15 ms -> 304 ms +- 7 ms: 1.20x faster Co-authored-by: Fabio Zadrozny <fabiofz@gmail.com>		2022-08-26 21:11:00 -04:00
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black	Lazily import parallelized format modules	2022-08-26 21:11:00 -04:00
blackd	add preview option support for blackd (#3217)	2022-08-12 20:23:02 -07:00
blib2to3	Use --no-implicit-optional for type checking (#3220)	2022-08-12 19:28:47 -07:00